Hey Everyone, I have an HTML5 (Construct 3) Web App, and have tried to upload it to the Amazon App Store, but each time it fails, and just shows a Blank Black Screen upon launch. I know that it works properly, because I have it up and running on my website. I have no clue what to do, if someone knew I would appreciate some help.

The apps are hosted, and listed below:
https://dk865.github.io/ninja
https://dk865.github.io/planetclicker-fire

Thank you all!

Why's everything a "div"?

Hi! I’m new here (sub and HTML).

I’m trying to boost my startup by making an online store, but I don’t know how to, and at the moment I can’t invest enough money to pay someone to do it for me. So, I’ve been trying to learn how to do it by myself, watching some YouTube videos and reading about HTML5 and CSS3, but I haven’t found any free courses to learn from (in Spanish)

I’m using Mimo (Duolingo for programming), but their system is pay-to-learn, and it would take months to learn the basics there. So, I would like to know if there are any free courses to learn how to build an online store using both HTML5 and CSS3.

I’ve tried watching FalconMasters and CódigoFacilito on YouTube, but both focus only on HTML.

Thanks in advance!